Prepare 14.1.3 release

Release issue: gitlab-org/release/tasks#2789 (closed)

Summary

This MR prepares 14-1-stable for 14.1.3.

Automated cherry-picking

Merge requests labeled Pick into 14.1 should be automatically picked into this MR using the following ChatOps command:

# In Slack
/chatops run release merge 14.1.3

Manual intervention

If merge requests cannot be picked automatically they have to be created manually targeting 14-1-stable-patch-3.

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See also Patch Releases documentation.